i had a 1.3 mk1 there the ones to go for better engine than the 1.4, as already said issues i had were welding and wiring, mine was chipped and ran 1 bar of boost no problem, even on just 7 - 8 psi sitting at 100 mph and flooring it in 5th gear side by side with a renault 5 it honestly left the 5 for dead, very equal cars low down but 100 mph + the little fiat would pull to 130 no problem.

i often contemplate buying one myself just for the nostagia of it.